CN102011930B - Air-cooled type cooling cycle thin oil device - Google Patents

Abstract

The invention provides an air-cooled type cooling cycle thin oil device, which relates to a thin oil station. The air-cooled type cooling cycle thin oil device is characterized in that: a low level oil tank adopts an air-cooled type oil cooler and is provided with a standby immersion type multiple-stage centrifugal pump, a double-tube filter and a magnetic filter; and the air-cooled type cooling cycle thin oil device is also provided with a high level oil tank. The device has high heat exchange efficiency, a compact structure, small occupied space and low system maintenance cost; when the oil pressure of an oil supplying main trunk is lower than a set value, the standby immersion type multiple-stage centrifugal pump is started up in time and supplies oil complementally; and the high level oil tank can supply oil continuously for a certain period of time when power failure occurs suddenly so as to ensure oil supply and lubrication of high-speed running equipment which continuously runs under inertia.

Description

Air-cooled cooling cycle thin oil device

technical field

The invention relates to an air-cooled cooling circulation thin oil device, in particular to a thin oil station.

Background technique

The oil station of the current thin oil station is mainly suitable for the thin oil circulation lubrication system of metallurgy, mining, forging, electric power, light industry, cement, port and other mechanical equipment, and is usually installed in the underground oil depot or pit near the machine. Most of them are cooled by water. This cooling method has the following disadvantages. First, the heat exchange efficiency is low, the cooling effect is not ideal, and the oil temperature is high, which is easy to cause damage to the lubricated equipment; The scale generated will reduce the water cooling effect. If the water quality is poor, the cooling pipe will be blocked, which will seriously affect the cooling effect and cause the equipment to be unusable. Third, if the water cooling equipment leaks from the cooling pipe, it will cause oil leakage and serious equipment accidents. The fuel tank in the prior art is large in volume, large in water consumption, large in floor space, and high in equipment production and operation costs.

Contents of the invention

Aiming at the defects existing in the prior art, the object of the present invention is to provide a refrigeration device with compact structure, small footprint, high heat exchange efficiency, low system maintenance cost and stable oil supply, and can Continue to ensure the oil supply lubrication of high-speed running equipment running under the action of inertia.

For achieving above object, the technical scheme that the present invention takes is:

An air-cooled cooling cycle thin oil device, including a movable low-level oil tank, a movable high-level oil tank and a control system, the low-level oil tank is equipped with an immersed multi-stage centrifugal pump and its backup pump, and the immersed multi-stage centrifugal pump The outlets of the pump and its backup pump are respectively connected to the filter, the filter is connected to the main oil outlet pipeline of the low oil tank, the main oil outlet pipeline of the low oil tank is connected to the inflow pipeline of the equipment lubrication point, and the outflow pipeline of the equipment lubrication point is connected to the The total oil return pipeline of the low fuel tank is connected, and the end of the total oil return pipeline of the low fuel tank is provided with a magnetic filter. between the road and the magnetic filter;

The oil supply port and the oil return port of the high-level fuel tank pipeline are respectively connected with the total oil outlet pipeline of the low-level fuel tank and the total oil return pipeline of the low-level fuel tank, and the bottom surface of the high-level fuel tank is higher than the inflow port of the lubrication point of the equipment;

The control system turns on or off the standby pump of the submerged multistage centrifugal pump according to whether the pressure in the connecting pipeline of the submerged multistage centrifugal pump is lower than a set value.

On the basis of the above scheme, there is one submerged multistage centrifugal pump and one backup pump.

On the basis of the above solution, the filter is a duplex filter.

On the basis of the above scheme, the control system also includes a temperature sensor,

The temperature sensor is set between the air-cooled oil cooler and the magnetic filter on the oil return main pipeline of the low oil tank. When the temperature sensor detects that the temperature of the oil passing through the air-cooled oil cooler is higher than the preset value, The output control signal increases the speed of the air-cooled oil cooler or increases the number of air-cooled oil coolers, otherwise maintains the speed of the air-cooled oil cooler or reduces the speed of the air-cooled oil cooler or reduces the number of air-cooled oil coolers the number of cooler runs;

On the basis of the above solution, the top of the low-level fuel tank is provided with a first intelligent magnetic flap liquid level gauge.

On the basis of the above scheme, there are four air-cooled oil coolers.

On the basis of the above scheme, the upper part of the high-level fuel tank is provided with a second intelligent magnetic flap liquid level gauge. The overflow pipe communicates with the total oil return pipeline of the low fuel tank, and the lower part of the oil inlet and outlet pipes of the high fuel tank is provided with a check valve, a stop check valve and a ball valve.

On the basis of the above solution, the high-level fuel tank is provided with a vent pipe.

The air-cooled cooling cycle thin oil device of the present invention is compact in structure, small in floor space, high in heat exchange efficiency, can effectively protect lubricated equipment, and has low system maintenance cost, generally only 20 to 30 times that of a water cooling system. %, even if the power supply of the power fan is cut off, there is still 30-40% of the natural cooling capacity; there is a spare submerged multi-stage centrifugal pump, which can supply oil when the main line pressure is too low; It can still supply oil to the lubricating point of the equipment continuously when the power is on; it is equipped with a duplex filter and a magnetic filter. Iron filings particles in the oil to ensure the cleanliness of the oil.

Description of drawings

The present invention has following accompanying drawing

Fig. 1 Structural schematic diagram of air-cooled cooling circulation thin oil device of the present invention

Figure 2 is the front view of the air-cooled cooling cycle thin oil device of the present invention

Reference signs:

1. Submerged multi-stage centrifugal pump; 2. Manhole; 3. Intelligent magnetic flap liquid level gauge for low fuel tank; 4. Return valve; 5. Pressure sensor; 6. Flow meter; 7. Duplex filter; 8. Reversing valve; 9. First temperature transmitter; 10. Low oil tank; 11. Air-cooled oil cooler; 12. L-shaped three-way valve; 13. Magnetic filter; 14. Smart magnetic flap liquid for high oil tank Position gauge; 15. High oil tank; 16. Bracket; 17. Overflow pipe; 18. Vent pipe; 19. Oil inlet and outlet pipe; 20. Stop check valve; 21. Check valve; 22. Ball valve; 23. Electric heating 24. Cut-off valve; 25. The total oil outlet pipeline of the low fuel tank; 26. The total oil return pipeline of the low fuel tank; 27. The first temperature sensor; 28. The second temperature transmitter; 29. The oil return of the high fuel tank 30. The oil supply port of the high oil tank; 31. The second temperature sensor; 40. The equipment lubrication point

Detailed ways

The present invention will be described in further detail below in conjunction with accompanying drawing 1 and accompanying drawing 2.

The air-cooled cooling circulation thin oil device includes a movable low oil tank 10 and a high level oil tank 15, the high level oil tank 15 is located on the bracket 16, and its bottom surface is higher than the inflow pipeline of the equipment lubrication point 40. Two submerged multistage centrifugal pumps 1 are arranged in the low oil tank 10, one of which is a working pump and the other is a standby pump. It is discharged through the return valve 4, the duplex filter 7, the reversing valve 8, and the cut-off valve 24, and flows out from the total oil outlet pipeline 25 of the low oil tank, and supplies oil to the equipment lubrication point 40 through the inflow pipeline of the equipment lubrication point 40, and Simultaneously also supply oil to high oil tank 15. Among them, the duplex filter 7 is the preferred filter, and the advantage of the duplex filter 7 is that when replacing the working filter screen or filter cartridge of one of the filter cartridges, it is not necessary to stop the work of the entire circulation system. Normal filters can also be applied. On the pipeline between the submerged multistage centrifugal pump 1 and the duplex filter 7, a pressure sensor 5 and a flow meter 6 are arranged. The pressure sensor 5 depends on whether the pressure in the pipeline connected to the submerged multistage centrifugal pump 1 is lower than Set the value to turn on or off the backup pump of submersible multistage centrifugal pump 1. When the pressure sensor 5 detects that the main line pressure of the total oil outlet pipeline of the low-level fuel tank is less than the set value, it outputs a signal to the control unit to start the standby submerged multi-stage centrifugal pump. Start the standby submerged multistage centrifugal pump 1, and the main line pressure setting value can be set according to actual needs. A first temperature transmitter 9 is arranged at the outlet of the duplex filter to monitor the temperature of the total oil outlet pipeline of the low oil tank 10 . The outflow pipeline of the equipment lubrication point 40 is connected to the main oil return pipe 26 of the low-level fuel tank, and the oil flowing out of the pipeline through the equipment lubrication point 40 passes through the general oil return pipeline 26 of the low-level oil tank 10 to connect with the air-cooled oil cooler 11, and then passes through the L Type three-way valve 12, magnetic filter 13 filter and flow back to the low oil tank 10. On the pipeline between the total oil return line 26 of the low oil tank and the air-cooled oil cooler 11, a first temperature sensor 27 is arranged. When the temperature is higher than the preset value, an output signal is sent to the control unit to connect the air-cooled oil cooler 11 to increase the speed of the air-cooled oil cooler 11 or increase the number of operating air-cooled oil coolers 11. When the first temperature When the sensor 27 detects that the temperature of the oil in the oil return line 26 of the low oil tank 10 is lower than the preset value, it outputs a signal to the control unit to connect with the air-cooled oil cooler 11, reducing the speed of the air-cooled oil cooler 11 or stopping Or reduce the number of running air-cooled oil coolers 11; on the pipeline between the air-cooled oil cooler 11 and the magnetic filter 13, a second temperature transmitter 28 is arranged to detect the temperature of the air-cooled oil cooler 11 The temperature of the oil after cooling; the magnetic filter 13 is located on the upper part of the low oil tank 10, and is connected to the end of the total return line of the low oil tank 10 through the L-shaped three-way valve 12, and the return oil passes through the magnetic filter in the low oil tank 10 13 Filtration, adsorption and removal of iron filings particles in the pipeline oil to ensure the cleanliness of the oil, and after further precipitation and heat dissipation in the low oil tank 10, it is then pumped out by the submerged multi-stage centrifugal pump 1 and sent to the After reaching the lubricated point 40, it cools and flows back to the low-level oil tank 10, so that the lubricating oil circulates and works to ensure the normal cooling and lubrication of the lubricated point 40 of the equipment. During normal operation, the submerged multistage centrifugal pump 1 is started and stopped by a button. The low fuel tank 10 is provided with a second temperature sensor 31, and the second temperature sensor 31 is located at the bottom of the low fuel tank. When the oil in the low fuel tank 10 is lower than the set value, the output signal is sent to the control unit to communicate with the electric motor in the low fuel tank 10. The heater 23 heats the oil, and when the oil reaches the set value, the heating is stopped. The duplex filter 7 is a mesh oil filter. Generally, when the pressure difference between the pipeline oil pressure of the submerged multistage centrifugal pump 1 and the filtered pipeline oil pressure is greater than 0.15 MPa, it is necessary to replace the spare filter cartridge, or replace The valve 8 realizes cleaning or replacing the working filter without stopping the work of the cooling circulation device. The pressure difference between the pipeline oil pressure of the submerged multistage centrifugal pump 1 and the filtered pipeline oil pressure can be set according to actual conditions. set up. The top of the low oil tank 10 is also equipped with an intelligent magnetic flap liquid level gauge 3, which will alarm when the oil level is lower than the preset value and need to replenish new lubricating oil; Manhole 2 Check whether oil or water from other equipment flows into the oil tank.

The high-level oil tank 15 is placed on the support 16, and the top of the high-level oil tank is provided with an intelligent magnetic flap liquid level gauge 14, and the bottom surface of the high-level oil tank 15 is respectively connected with the inlet and outlet oil pipes 19 of the high-level oil tank, the overflow pipe 17, and the vent pipe 18. The bottom of the inlet and outlet oil pipe 19 of the high fuel tank is provided with a check valve 21, a stop check valve 20, and a ball valve 22, and communicates with the oil supply port 30 of the high fuel tank, and the overflow pipe 17 communicates with the oil return pipe 29 of the high fuel tank. The bottom face of the oil tank 15 is higher than the inflow line of the system lubrication point 40 . When the high-level oil tank 15 works normally, after the oil flows out from the total oil outlet pipeline 25 of the low-level oil tank 10, it also supplies oil to the oil supply port 30 of the high-level oil tank 15. The intelligent magnetic flap liquid level gauge 14 of the high-level oil tank monitors the oil When the oil liquid is higher than the set value, part of the oil liquid is discharged through the vent pipe 18 of the high oil tank to keep the set reserve of the high oil tank. The oil flows to the high oil tank 15 through the oil inlet and outlet pipes 19, and when it is higher than a certain value, it passes through the overflow pipe 17, the oil return port 29 of the high oil tank, the total oil return line 26 of the low oil tank, the air-cooled oil cooler 11, L Type three-way valve 12, magnetic filter 13 filter and flow back to the low oil tank 10. When the power is suddenly cut off, the oil will continue to supply oil to the equipment lubricating point 40 for a period of time through the oil inlet and outlet pipes 19 of the high-level oil tank, the check valve 21, the stop check valve 20, the ball valve 22, and the main oil outlet pipeline 25 of the low-level oil tank. Play the role of continuous lubrication and protection of equipment.

The present invention is not limited to the above-mentioned best implementation mode, and anyone should know that any structural changes made under the inspiration of the present invention, and any technical solutions that are identical or similar to the present invention, all fall within the protection scope of the present invention.

Claims (8)

1. An air-cooled cooling cycle thin oil device is characterized in that: it comprises a low-level oil tank, a high-level oil tank and a control system, the low-level oil tank is provided with a submerged multistage centrifugal pump and a standby pump thereof, and the submerged multistage centrifugal pump The outlets of the pump and its backup pump are respectively connected to the filter, the filter is connected to the main oil outlet pipeline of the low oil tank, the main oil outlet pipeline of the low oil tank is connected to the inflow pipeline of the equipment lubrication point, and the outflow pipeline of the equipment lubrication point is connected to the The total oil return pipeline of the low fuel tank is connected, and the end of the total oil return pipeline of the low fuel tank is provided with a magnetic filter. between the road and the magnetic filter; The oil supply port and the oil return port of the high-level fuel tank pipeline are respectively connected with the total oil outlet pipeline of the low-level fuel tank and the total oil return pipeline of the low-level fuel tank, and the bottom surface of the high-level fuel tank is higher than the inflow port of the lubrication point of the equipment; The control system turns on or off the standby pump of the submerged multistage centrifugal pump according to whether the pressure in the connecting pipeline of the submerged multistage centrifugal pump is lower than a set value. 2. The air-cooled cooling cycle thin oil device according to claim 1, characterized in that: there is one submerged multistage centrifugal pump, and one backup pump. 3. The air-cooled cooling circulation thin oil device according to claim 1, characterized in that: the filter is a double cylinder filter. 4. The air-cooled cooling cycle thin oil device according to claim 1, 2 or 3, characterized in that: the control system also includes a temperature sensor, The temperature sensor is set between the air-cooled oil cooler and the magnetic filter on the oil return main pipeline of the low oil tank. When the temperature sensor detects that the temperature of the oil passing through the air-cooled oil cooler is higher than the preset value, The output control signal increases the speed of the air-cooled oil cooler or increases the number of air-cooled oil coolers, otherwise maintains the speed of the air-cooled oil cooler or reduces the speed of the air-cooled oil cooler or reduces the number of air-cooled oil coolers the number of cooler runs; 5. The air-cooled cooling cycle thin oil device according to claim 4, characterized in that: the top of the low oil tank is provided with a first intelligent magnetic flap liquid level gauge. 6. The air-cooled cooling cycle thin oil device according to claim 4, characterized in that: there are four air-cooled oil coolers. 7. The air-cooled cooling cycle thin oil device as claimed in claim 4, characterized in that: the upper part of the high-level oil tank is provided with a second intelligent magnetic flap liquid level gauge, the high-level oil tank is located on the bracket, and through the high-level oil tank The oil inlet and outlet pipes communicate with the total oil outlet pipeline of the low fuel tank, the overflow pipe of the high fuel tank communicates with the total oil return pipeline of the low fuel tank, and the lower part of the fuel inlet and outlet pipes of the high fuel tank is provided with a check valve, a stop check valve and a ball valve. 8. The air-cooled cooling circulation thin oil device according to claim 7, characterized in that: the high-level oil tank is provided with a vent pipe.

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